Motor-controller.



G. T. HENDERSON.

MOTOR-CONTROLLER.

APPLICATION FILED 001217, 1908.

994,080. Patnted m 30, 1911.

' lllllllll V v i entran sures PA E-I crane tr.- nnnnnason; or MILWAUKEE, Wisconsin; ASSIGNOR TO inn CUTLER; nannies me. 00., or MILWAUKEE, WISCONSIN, A CORPORATION or WISCONSIN.

' I MOTOR-CONTROLLER.

aeaoso.

Specification of Letters Patent.

Patented May 310, 1911."

Application filed October 17, 1908. Serial No. 458,266.

It; all whom it may concern:

Be it known that I, CLARK. T. HENDERSON, a citizen of the United States, residing at Milwaukee, in thecounty of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Motor-Controllers, of which the following is a full, clear, concise, and exact description, reference being, had to the accompanying drawing, forming a )art of this specification.

fly invention relates to improvements in motor controllers, and particularly to controllers which are employed for operating motors in-series parallelrelation; There are instances in practice where it would be advantageous to connect: two meto s in series andrun-them in one direction,

and then connect the motors in parallel and run them in the reverse direction. For example: It is desirable to operate the motors in this manner on screw downs for rolling mills. In such machines the rolls should be movcd don n in very small increments, but should bo r sod as rapidly as practicable after th 1 i'ling operation is completed, so as to FIN time. It has been diflicult to use series parallel control upon screw downs since the advent of n'mgnetically operated controllers, owing to the fact that a large number of electromagnetically operated switches would be required in order to reverse the motors and change their electrical rolal'ion- I i The object of the present invention is to provide a structure wherein the number of .=nvitcl1es required to control the series pan allel relation and the direction of operation of the motors will be less than has heretofore been required. v l

in order to more fully set forth the nature of my iiwontioln l have diagrammatically illustrated. in the acconipanying drawing,

the general principles of my controller.

The drawing merely illustrales'the control in a schematic way. in practice various devices. in addition to those which I. have illustrated, would lie cniplovcd, and the structure. as a whole, would be clabmzilt'od, but 1 have deemed it better to eliminate these things in my application, as tl'iey are well understood in the art and. would only tend to complicate the disclosureof the prin ci pal features-0t my invention. The drawing should, therefore, be construed in an illustrative sense and not in a limiting manner.

For the purpose of illustration 1 have shown two motors, one having armature A. and series field A, and the other having armature B and series field B. These armatures and fields are connected -e1ectrically in a suitable manner. The armature of one motor and the field of the other preferably being arranged on one side of a given point, and the other armature and field bein arranged on the opposite side of said point 'A switch, 1 actuated by solenoid 2, serves to connect the motors across the line in'series relation. A switch 3, actuated by' solenoid 4-, serves to connect the motor across the line in parallel and to reverse the relative polarity of each motor to run t he motors in a reverse direction. The switch 3 serves to connect point X to one side of the line. The switch 5 serves to connect. the armature A and the field B to the other side of the line in parallel with the armature B and field A, which are connected between the point and the other side of the line. Hence the relative polarity of the field and armature of each motor is, therefore, reversed, thereby reversing the operation of the motor. For the purpose of accelerating the motors,resistances R,*R and R are provided, which are controlled by switches 6, 7'and 8, which switches are actuatedrespectively by solenoids 9, l0 and 11.

The operation of the various switches which have been described is directed by means of a master switch M, which switch is assun'ied to be of the drum tivp'e,andn-de- 'velopment of the contacts of the master switch, is shown in the drawing. On one side of the drum are segmentsa, Z), 0, (Z and c, and on the'other side segments f, 5 72, i and 7', between the right and left hand segments are shown the contact fingers which are engaged thereby when the master con troller is moved. It the master controller bemoved so that the lett'hmd segments engage the fingers, the rolls will be lowered, andit' it bemoved so that the right hand egments engage tlfe fingers the rolls will be raised. r

I shall now-describe the operation of the system. Letit be assumed that it is desired to lower the rolls. Accordingly the controller is moved to bring the left hand segments into engagement with their respective contact lingers. The master controller has four positions on each side of its central position. which positions are indicated by dotted lines. first left hand position the segment 7) engages its contact finger as well as segment accordingly switch 1 is closed as circuit is closed from the positive line through seg ments a, b, conductor 12, conductor 13, solenoid '2, conductor 11, conductor 13, to the negative line. Switch 1 connects the motors in series. The motor circuit, now extends from positive line through conductor 16, conductor 17, resistances R R U. conductor 18, conductor 19, switch 1, field B, armature A, field A, armature B, to the negative line. As the master controller is moved to the second, third and fourth positions, switches 6, 7 and 8 are closed respectively, thereby short-circniting resistances R, R and R speeding up the ,motor. The circuits of solenoids 9, 10 and 11 extend from segments 0, (Z and a, through said solenoids ,in parallel and thence through conductor 14 and conductor 15 to the negativeline. \Vhen the rolls have been lowered to the desired degree, the motors may be stopped by returning the master controller to the oil position. In order to raise the rolls the master controller is moved to bring the right hand segments into engagement with their respective fingers to thereby reverse the motors and connect them in parallel relation so that the same will raise the rolls rapidly. When the controller is in thefirst right hand position, switches 3 and 5 areclosed,the circuits oftheoperatin windingsandtl thereof being closed by t 1e segment 9'. The circuit of solenoid (3 extends from segment through conductor 20, solenoid 6, conductor 21 and conductors 1- and 15, to the negative line. The circuit of solenoid 4 extends from segment through conductor- 20, conductor 23, conductor 24, solenoid -t and conductor 15, to the negative line. The m tor circuit now extends from the positive line through conductor 1t; and conductor 1?. resistances R, It and II, (.(Hll'llltfiUl l8,conductor1!).switch 3 and conductor 23, to the point X. where it divides. The armature A and the field B are connected between the point X and the negative lin by switch 5. the circuit extending from point X through armature A, field B, conductor 26, switch .7. to the negative line. This ticld A and the armature B are connected between the point X and the negative line; hence the armature A and the field B are connected in parallel with the field A and the armature B, and also the relative polarity of the armature and field of each motor is reversed so that the motors will run .in a reverse direction and raise the rolls. It will thus be seen that by means of a very simple circuit arrangen'ient,

When the controller is in the which re uires a minimum number of switches, am able to reverse the motors and run them in parallel relation as the master controller is moved to the second, third and fourth position 011 the right the switches (i, T and 8, operate in the manncr previouslv described, thereby removing resistances I", It and R from circuit and speeding up the motors. 7' I It will, of course, he obviousthat the principles of my invention may he applied to various dillerent st ructurcs, all of which fall within the purview o the claims appended hereto.

hat I claim as new'and desire to secure by Letters Patent is 1' In a controller for a plurality of mo tors, means for connecting said motors in series, and other means for connecting said motors in parallel and inherently reversing the operation thereof.

2. In a motor controller for a plurality of motors, means for connecting the motors in series, other means for conn'ectix said motors in parallel and reversing thcdirection of operation thereof simultaneously, and meansfor varying a controlling resistance for the motors.

3. In a controller for a plurality of motors, a switch for connecting the motors in series relation, two other switches for conmeeting the mtors in parallel relation and insuring reversal of the relative pole rity of the armature and field of each motor.

4. In a controller for a plurality of motors, a switch for connecting the motors in series relation, two other switches for connectin the motors in parallel relation and reversing the relative polarity of the armature and field of each motor, and resistance controlling switches.

5. In a controller for a plurality of 1notors, a switch for connecting the motors in series relation, two other switches for corn necting the motors in parallel relatiim and reversing the relative polarity of the armature and field of each motor, and resistance controlling switches, and a master switch for directing the operation of all of said switches.

(3. In a motor controller in combination, means for connecting the motors in series relation and switches for connecting the armature of one motor and the field of the other in one branch circuit, and the other armature and the other field in another branch circuit to reverse the n'iotors and run them in parallel relation.

T. In a controller for a plurality of mo tors, means for connecting the motors in series relation, the armature of one motor and the field of the other. being arranged on one side of a given point. and the other arn'iatnre and the other field being arranged on the other side/of said point and connected to one side of the source of supply whereby the motorsniay be connected in parallel and the relative polarity of the armature and field of each motor may be reversed to run the motors in a revese direction.

8. In a motor controller to a plurality of anotors, in con'ibination, a switch for connectiiigthe motors in series relation, the armature of one motor and the field of the other being arranged on one side of a given point, and the other armature and the other field being arranged on the opposite side of said point; a switch for connecting said point to one side of the source of supply,

another switch for connecting the first. mentioned armature and field between said point. and the other side of the source of supply. whereby the motors will be connected in pa 'allel and run in a reversedirection.

9. In a motor controller for a pluralitv of motors, in combination, a switch for con necting the motors rn series relation, the

armature of one motor and the field of the otherheing arranged on one side of a given point. and the other armature and the other field being arranged on the opposite side of said point; a switch for connecting said point to one side ot the source of supply, another switch tor connecting the first men tioned armature and field between said point and the other side ot the source of supply,

. whereby the motors will be comuarted in pari said point;

(switch for connecting the first mentioned armati'ire and field hetw'een said point and the other'side ol the source of supply.

whereby the motois will be connected in parallel and run in -a. reverse direction. and resistance controlling switches for said ino- .tors, and a master switch for directing the ioperalion of? said switches.

ll. controller for a plurality ol electric motors; comprising an elcctromagneticall v opm-a'ted switch for connectin the motors in series. the armature of one motor and the I lield ol' the other motor being"arranged on one side of a given point and the other nected in parallel.

field and armature. being arranged on the fitopposite side of said point, and an electromaenetically operated switch for connecting said point to one side of the source of supply, another electromagnetically operated switch for connecting the first mentioned armature and field to the other side of the source of supply, and electromagnetically operated switches for controlling resistance arranged in circuit with said motors, and a master switch for directing the operation of said switches. v

12'. A controller for a plurality of motors, comprising three single pole switches adapted to be operated to connect the motors l in either series or parallel relation and to insure the reversal of the 13. A controller fora plurality of mo tors. comprising three single pole switches adapted to be operated to connect; the motors' in series to operate in one direction and to establish parallel connections torthe nio tors which will insure a reversal in polarity motors when con of the field or armature of each motor to cause the motors when connected in parallel to operateiu an opposite direction.

ll. In a controller for a plurality of electric motors, in combination, means for connecting the motors in series to cause the same to operate in one direction and other means for connectin the motors in arallel the parallel connections being such as to inherently cause the motors to operate in a reverse direction to that in which they operate when connected in series. i

15; A controller for a plurality of motors comprising means for connecting the motors either in series or in parallel-relation with the field of each motor in series with the a rinature of another motor. the parallel connections l)tll'l 1' such as to insure operation of the motors in an opposite direction to that in which they operate when connected in.

series.

16. In a controller for a plurality of elec tnic -niotors in combination, means for connecting the motors in series to operate in one direction and two single pole switchesfor eomiectine' the motors in parallel and reversing" the operation thereof. f

, In witness whereof. I have ,hereunto subs scribed my name in thecpresence of two witnes es. z

CLARK 'l-. HENDERSON. \Vitnesses i J. S. \Vrnuorr,

S. Frrzoi-nrnlo. 

